Apparatus for the continuous control of the properties of solid bodies dispersed in a liquid



March 21, 1933. MULLER-CLEMM 1,902,659

APPARATUS FOR THE CONTINUOUS CONTROL OF THE PROPERTIES OF SOLID BODIES DISPERSED IN A LIQUID Filed Oct. 6, 1930 lnvenl-or: Hell muth MCLHcP- C Lemm,

r Att'ovneq Patented Mar. 21,1933

' from it, is caused to MUTE KU'LLEB-GLIKI, OF

mm ZELLSTOIIFABBIK WALDHOF,

PATENT. orF cE OF IANNHEIIEI-WALDHOF, GEM! mm'rus 203. ram conrmuous commoner m rnornn'rrm or. son-n) nomns msrmsan m A mourn ap lication mea Octobcr 6, 1930, Serial m.

These drawbaclrs are completely obviated by the present invention according to which a a thin layer of the li uid, or a portion derived How past a source-of light illuminating the layer whereb the liquid may be examined in all its details through a sheet of glass or other transparent medlum.

- In this way, a continuous clear view of the substances dispersed'in the liquid is obtained and its properties are shown at a glance. It is seen .at once whether the material contains impurities (in cellulose washings, for example splinters, chi s, etc.) the size or color of the particles an an imperfections present are visible. The e ciency of a mechanical or chemical treatment of the material can be determined and the treatment controlled as required. Any changes in the composition or other properties (purity, color, etc.) of the sus ndedbodies are made obvious.

e accompanying drawing shows diagrammatically examples of apparatus embodying the invention and. for use, for exam le, in testing the washin s of fibrous materials (wood pulp, paper pu p or the like).

Fig. 1 shows the apparatus insectiozand Fi 2 is a front view.

he 1i uid containing the matter in suspension ows in the direction shown by the arrow through two flat boxes a and b inclined at an acuteflangle 'to one another, the liquid enters at the lower end of the box a, where it is connected with the inlet pipec, rises in the box and flows over the upper edge at d into the box 6, descends thereinand leaves by the outlet pipe e to return to the main body of the 488,852, andin Germany February a, mo.-

material. The front wall f and rear wall g of the box a are formed of glass sheets; behind therear wall g there is a source of light )5. with a screen, so that the illuminated material can be clearly examined at Wall v The box I) can beopened at the junction d of the two boxes. A platez' is placed at the lower end of the box a, in order to reduce the =1". -wn.nnor. emaux;nssrcnoa 'ro-m the front rate of flow so that the individual particles of the material and anyvimpurities can be clearly seen. In apparatus, such as sizing; or grinding mills, through which there is a constant flow and where a continuous control of 'the propertiesof the material is required, the

apparatus is simply inserted in the eflluent. In apparatus fed intermittently, but in which the suspension is in constant motion (for example washin apparatus, bleaching machines or the li e), one portion of the liquid 0- containing the matter in suspension can be branched ofi to the apparatus and the control device inserted in the branch pipe.

The funnel-shaped enlargement shown in the drawing'at the inlet to the box d has the advantage that the velocity of flow is reduced, or the pressure lessened, and this flow easily controlled. J

For. a better estimation of the properties, a standard example of the particular suspension can be rovided within. or without the illuminated eld of observation? The apparatus described above \for use in connection with fibrous materials can be used in all other operations, for instance with china clay and other mineral washings, colored clays and other dyestuifs, suspensions of various animal or vegetable =ori 'n, which have to be otherwise treated. The suspension may be illuminated indirectly by providing'the interior of the box traversed by the suspension with a reflecting rear wall.

The direction of flow which in the example shown is from below upwards can obviously be in other directions, for example in horizontal or inclined or (particularly in treating very heavy substances) from above downwards.

purified, comminute or I claim 1. Apparatus for viewing the presence and v nature of solid matter in suspension in a liquid in motion, the said apparatus. comprising a vessel having its front'and back walls spaced apart a distance less than the distance 2 between its side walls and having an outlet at one end, a chamber having one of its ends in open communication with the other end of saidvessel and having an inlet'in its op 0- site end, the cross section of said chamber increasing from said inlet toward said vessel,

a source of lightdisposed outside the vessel and sheetsof transparent material formin the front and rear walls of said vessel an disposed opposite said source.

2. Apparatus for viewing the presence and nature of solid matter in-suspension in a liquid in motion, the said ap aratus'comprising a vessel traversed by t e liquid, the said vessel consisting of a straight inflow portion and a straight outflow portion, each of substantially rectangular cross-section, the two portions being relatively inclined with their axes in the same vertical plane, a junction connecting the said inclined portions, a

I source of light disposed in the space between site said source oflight, a throttle the said inlinedportions, sheets of trans parent material forming opposite sides of one of said inclined portions and disposed opposerted inone of said inclined portions and a funnel shaped enlargement atthe base of said inflow portion.

3.. Apparatus according to claim 1 wherein a bafile extends obliquel from therear wall' toward and terminates s ort of thefront'wall of the vessel adjacent theinlet end of the vessel.

In testimony whereof I have signed my name-to this specification.

HELLMUTH MULLER-CLEMM.

late in- 

